{
  "manageEntity": {
    "action": "Save",
    "entityId": "88223183",
    "entityType": "Track",
    "nonce": "0x4e477d1f8cca8f14c004b07a0382e18d8753f453fed93844b20955a082e5c544",
    "signature": "0xa2e7bc0bf916c0f6d324fa568091d7f244dc29e26589c413c39f906ec1a2dc5b4c511deb2b28ff62241ef5905a9d3b3ca335715fcf9423cde77ca49a9cfce2b01c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}